/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Populates the passed array of TriangleIDs with the triangles connected to this vertex
template<typename Alloc> void GetVertexConnectedTriangles ( const [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID, [TArray](API\Runtime\Core\Containers\TArray)< [FTriangleID](API\Runtime\MeshDescription\FTriangleID), Alloc > & OutConnectedTriangleIDs ) const